“In one day eight big size rats were killed,” said a Marcy Houses resident who declined to be named for fear of reprisal from city or property management. They were found in and around the buildings of the Nostrand-Myrtle avenue section of the property and have been seen on the playground. “They come out at night and the daytime,” said another resident who also did not want to provide a name.Even before the mega-rats appeared, residents say the infestation of average rats was a problem. One resident recently described a frantic scene in which rats began scrambling across the nearby playground: “Adults had to grab children and run because a lot of rats came on the playground. The kids were screaming.”